Somewhere on this site - god knows where, though - there's a picture of an Optimess control box mounted on the front bulkhead, underneath the master cylinders, of some car. If you can find it, you might be able to get a model number and be able to find the specifics you seek.

How they reveal the wheel-slip from chassis movement relative to the ground?
Initially i thought it measures wheel slip with centripetal acceleration (accelerometer) and steering angle,and then it is possibile to detect wheel slip.
Correct me if i am wrong.

hardingfv32 wrote:

bhallg2k wrote:You'll see them on most cars in testing and on Fridays during race weekends.

Squall wrote:How they reveal the wheel-slip from chassis movement relative to the ground?
Initially i thought it measures wheel slip with centripetal acceleration (accelerometer) and steering angle,and then it is possibile to detect wheel slip.
Correct me if i am wrong.

hardingfv32 wrote:

bhallg2k wrote:You'll see them on most cars in testing and on Fridays during race weekends.

In any event, for those curious about optical sensors... feel free to read up on them.

Very interesting, thank you!
Do you know how (the physical principle) a laser can measure speed?

Pitot Tube is used for measuring speed in F1.
A laser can measure speed with two different methods:
1) The instrument shoot a "ray" to an object and it analyzes the frequency of the ray that "returns" to the instrument. It uses Doppler Effect: the frequency of the ray that returns changes depending of the speed of the object.
2) The instrument measures how long a ray shot to an object does take to "return" to the instrument. It uses the kinematics formula of uniform motion: d=c*t
c= speed of light
t= time for the "returning" of the ray

"Two things are infinite: the universe and human stupidity, but about the universe I still have some doubts." Albert Einstein

italian wrote:A laser can measure speed with two different methods:
1) The instrument shoot a "ray" to an object and it analyzes the frequency of the ray that "returns" to the instrument. It uses Doppler Effect: the frequency of the ray that returns changes depending of the speed of the object.
2) The instrument measures how long a ray shot to an object does take to "return" to the instrument. It uses the kinematics formula of uniform motion: d=c*t
c= speed of light
t= time for the "returning" of the ray

Where would the ray shoot? If it were measuring time to return that would probably be a ride height sensor more than anything.

If you were to create a "speed gun" using doppler; where would you shoot? You can't shoot front/rear/sides because the walls etc would change.